Tyre Pressure Warning Light

50Twuncle

The Low Tyre Pressure Warning Light on my Suzuki Swift appears to have a mind of its own
It comes on for no good reason and then goes out again
It came on 2 months ago - just as I was taking the car in for a service - they reset it during the service
It came on again yesterday - but this morning is off again
Has anyone had this happen to them - is there a permanent fix (short of removing the fuse) ?
In any case - the light tells you that A tyre is losing pressure (not which one) - useless ?

verityboo

Perhaps the obvious suggestion is to check the type pressures. Sounds like one tire is border-line low

50Twuncle

verityboo wrote: »

Perhaps the obvious suggestion is to check the type pressures. Sounds like one tire is border-line low

Sorry - forgot to say - did that, yesterday and none were down - they were all 38 +/- 2 psi - which I understand should be fine

tykesi

Do you know if the Swift uses the ABS sensors for the warning system or sensors in the wheels themselves?

My car uses the ABS but on my motorbike there are sensors in the wheels which have batteries. It's not happened to me but I hear the warning system can show a fault when the batteries are low.

alleycat`

Does it use the ABS to measure the tyre pressures (based on rotation speeds) or does it have specific valves that measure the pressure?

If it's the valve "type" system it could be one of those is failing / battery wise.

If it's the ABS type then i don't know enough about how they work to comment unless something has come adrift connection wise.

Edit: Cross posted with tykesi.

maninthestreet

With the ABS system I have on my AUDI, you need to press and hold the TPMS button on the dashboard (with the car stationary) until bleeps any time you have altered the pressure in any of the tyres.

50Twuncle

tykesi wrote: »

Do you know if the Swift uses the ABS sensors for the warning system or sensors in the wheels themselves?

My car uses the ABS but on my motorbike there are sensors in the wheels which have batteries. It's not happened to me but I hear the warning system can show a fault when the batteries are low.

I am not sure - All that I know is that it has indivdual pressure caps with sensors built in (with batteries in each ?)

tykesi

50Twuncle wrote: »

I am not sure - All that I know is that it has indivdual pressure caps with sensors built in (with batteries in each ?)

Just thought I'd try and help by googling this for you and the first result was:

https://forums.moneysavingexpert.com/discussion/5133257

What happened in the end when you had the same issue last year?

The same answers were given then so not sure why you're asking the same question again?

I won't be doing any more googling if you cant be bothered doing it yourself.

almillar

Sorry - forgot to say - did that, yesterday and none were down - they were all 38 +/- 2 psi - which I understand should be fine

When you check the tyre pressures or inflate, you need to tell the monitoring system that they are 'good' - have a read of your manual to find out how. The system simply remembers the pressure, and warns of any small ('check tyre pressures') or big ('PUNCTURE!') changes. It won't work if you don't set it.

Iceweasel

That +/- 2psi would not be OK for me.

I think that you you should have them much more equalised/balanced than that.

No way could I drive around with one front tyre being 40 and the other being 36 for example.

And of course the system MUST be reset every time you check the pressures - it only takes a second.

neilmcl

Also, 38 psi seems very high for a Suzuki Swift, are these the recommended pressures?